An 8.2% efficient solution-processed CuInSe2 solar cell based on multiphase CuInSe2 nanoparticles

Abstract

Multiphase CuInSe 2 (CISe) nanoparticles including the CuSe phase are synthesized by the microwave-assisted solvothermal method. Without additional processing, multiphase CISe nanoparticles facilitate the solution-processed CISe absorber layer with a dense microstructure, large grains, high crystallinity, and composition controllability, which are essential for acceptable thin-film solar cell performance. The high performance, solution-processed CISe solar cell, with a conversion efficiency of 8.2%, is obtained through phase transformation, microstructural evolution, and composition adjustment by selenization (annealing under a Se atmosphere) at 530 C.

Real-time observation of Cu2ZnSn(S,Se)4 solar cell absorber layer formation from nanoparticle precursors

“…[1][2][3][4][5][6] It has been demonstrated that Cu-Zn-Sn-S nanoparticle films can be transferred into microcrystalline kesterite Cu 2 ZnSn(S, Se) 4 (CZTSSe) absorber films for solar cells with energy conversion efficiencies of up to 7.2 % by selenization at 500°C. 2 A partial substitution of Sn by Ge lead to a further increased efficiency of 8.4 %.…”

Comparative advantages of Zn–Cu–In–S alloy QDs in the construction of quantum dot-sensitized solar cells

“…3 Among various QDs, I-III-VI 2 group (especially CuInS 2 (CIS), and CuInSe 2 (CISe)) QDs have drawn special attention as sensitizers due to their environmental benignity, high absorption coefficient ($10 5 cm À1 ), and near optimal band gap (1.0-1.5 eV) for photovoltaic applications. [4][5][6][7][8][9][10] Very recently, a new efficiency record over 11% for QDSCs has been reported based on a CISe QDs sensitizer. 11 In comparison, the photovoltaic performance of its counterpart CIS-based QDSCs is much poorer with the highest certied efficiency of only 6.66%.…”

Synthesis and formation mechanism of CuInS2 nanocrystals with a tunable phase

“…[1][2][3][4][5] Among the compound semiconductors, direct bandgap CuInS 2 (CIS), which has a large optical absorption coefficient (>10 5 cm −1 ) and desirable bandgap (~1.5 eV) matching well with solar spectra, is a promising semiconductor for photovoltaic devices and other optoelectronic applications. 6 There are three crystalline phases, e.g., chalcopyrite, wurtzite and zinc blende for CIS.…”